Network test instrument



FIG. 1 is a perspective view of a network test instrument embodying my new design;

FIG. 2 is a front plan view thereof;

FIG. 3 is a top elevation view thereof;

FIG. 4 is a bottom elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof; and,

FIG. 7 is a back plan view thereof.

The broken lines shown in FIG. 1 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a network test instrument, as shown. 